public class SortTest {

    public static void main(String[] args) {
        int[] array = new int[] { 5, 1, 6, 4, 7, 3, 2 };
        println(array);
        // insertSort(array);
        // chooseSort(array);
        // bubbleSort(array);
        sort(array);
    }

    // 1.冒泡排序
    static void bubbleSort(int[] array) {
        if (array == null) {
            return;
        }
        for (int i = 1; i < array.length; i++) {
            System.out.println("-----i=" + i + "-----");
            for (int j = 0; j < array.length - i; j++) {
                if (array[j] > array[j + 1]) {
                    int temp = array[j];
                    array[j] = array[j + 1];
                    array[j + 1] = temp;
                    println(array);
                }
            }
        }
    }

    // 2.选择排序
    static void chooseSort(int[] array) {
        if (array == null) {
            return;
        }
        for (int i = 0; i < array.length; i++) {
            System.out.println("-----i=" + i + "-----");
            int temp = array[i];
            int smallIndex = i;
            for (int j = i + 1; j < array.length; j++) {
                if (temp > array[j]) {
                    temp = array[j];
                    smallIndex = j;
                }
            }
            array[smallIndex] = array[i];
            array[i] = temp;
            println(array);
        }
    }

    // 3.插入排序
    static void insertSort(int[] array) {
        if (array == null) {
            return;
        }
        for (int i = 0; i < array.length; i++) {
            int temp = array[i];
            int index = i;
            for (int j = i - 1; j >= 0; j--) {
                if (temp < array[j]) {
                    array[j + 1] = array[j];
                    index = j;
                }
            }
            array[index] = temp;
            println(array);
        }
    }

    // 4.
    static void sort(int[] array) {
        if (array == null) {
            return;
        }
        for (int i = 0; i < array.length; i++) {
            System.out.println("-----i=" + i + "-----");
            for (int j = 0; j < i; j++) {
                if (array[i] < array[j]) {
                    int temp = array[i];
                    array[i] = array[j];
                    array[j] = temp;
                }
            }
            println(array);
        }
    }

    static void println(int[] array) {
        if (array == null) {
            return;
        }
        for (int i = 0; i < array.length; i++) {
            System.out.print(array[i] + "  ");
        }
        System.out.println();
    }

}